Archive for the ‘Uncategorized’ Category

Laser Diode Housing from Hardware Store Parts

Laser Diode Housing, MacGyver'ed

Laser Diode Housing, MacGyver'ed. The focus is not THAT horrible, the camera picked up too much splatter.

I never seem to be able to finish my laser engraver/cutter from broken DVD-RW drives project (inspired by Groover’s pocket laser engraver) because I keep opening new DVD drives and keep finding reasons to go on tangent mini-projects. Most of those mini-projects are brought about by my admiration of the amount of useful parts a DVDs has (even a broken one, apparently) and some are caused by specific challenges each new opened drive brings. So, at some point I opened an HP SDVD8821H DVD R/RW/RAM Drive and found this laser diode inside:

Laser diode on a chip with PD arrays (front)

Laser diode on a chip with PD arrays (front)

Laser diode on a chip with PD arrays (back)

Laser diode on a chip with PD arrays (back)

It’s a weird looking laser diode (LD) that is mounted in the same case with the photodiode arrays which makes for simplified optics but I did not have any housing for this shape/size diode. By the way, if anyone reading this knows a professionally made housing for this type of LD, please post a comment with the reference, I would greatly appreciate that. The diode is just slightly smaller than your more standard 9mm LD – it’s smaller diameter is 6.50mm and the larger diameter is 8.25mm so it fits neither 5.6mm nor 9mm standard size housings.
This made me think that I may not be the only one stuck without a proper housing for a laser diode and I decided to see what it would take to build a housing for a laser diode out of parts available only in the disassembled drive itself and in a local hardware store. Here is what came out
Read the rest of this entry »

First post

Well, this is the first post at Elabz.com. We plan on making this site a diary about electronics projects and a repository of tools and downloads for the fellow electronics enthusiasts. Please come back soon for more info.

Related Posts

Coming soon ...

Recent Comments
  • rodrigo: hola estoy trabajando con un scorbot er3 mi duda es: que circuito implementaste para leer los pulsos del...
  • rodrigo: hello my name is rodrigo work with a scorbot er3 and my doubt is how you got the reading of the encoders the...
  • admin: The problem with 1/8th microsteps however, is that the difference in current (or PMW pulse width, depending on...
  • admin: (darn overly sensitive Mac mouse for wiping out LONG explanation, sorry I can’t bring myself to type all...
  • greg: Thanks for your reply. It all makes sense what you are saying, although I`m not totally sure what you mean the...
  • admin: Hi Greg, thanks for stopping by my blog. You can increase the motor voltage, to add torque, but I would not...
  • greg: Hi! Thanks for publishing this, very useful thread! I just built it exactly the same way to drive a small...
  • deadshot: can someone send me a link to the sites where i can buy those ic and the rest
  • Filippo: Hi, thank you for this post.. Very instructive. Actually I’d have some question.. I want to use a BLDC...
  • Gwynbleidd: Fix the animation !! The steps are fine but reversed, do not turned clockwise